<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png">
        <span>电商后台管理系统</span>
      </div>
      <el-button
        type="info"
        @click="logout"
      >
        退出
      </el-button>
    </el-header>
    <!-- 主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse? '64px' : '200px'">
        <div
          class="toggleNav"
          @click="toggleCollapse"
        >
          |||
        </div>
        <!-- 侧边栏导航 -->
        <el-menu
          background-color="#545c64"
          text-color="#fff"
          active-text-color="#4096FF"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <!-- 一级菜单  index属性是每一栏导航的标识-->
          <el-submenu
            :index="item.id+''"
            v-for="item in menuList"
            :key="item.id"
          >
            <!-- 一级菜单模板 -->
            <template slot="title">
              <i :class="iconOgj[item.id]" />
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/' + subItem.path)"
            >
              <!-- 二级菜单模板 -->
              <template slot="title">
                <i class="el-icon-menu" />
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容 -->
      <el-main><router-view></router-view></el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data: function () {
    return {
      // 左侧菜单数据
      menuList: [],
      iconOgj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      // 是否折叠
      isCollapse: false,
      // 别激活地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout: function () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) {
        this.$message.console.error('获取导航列表失败')
      }
      this.menuList = res.data
      console.log(res)
    },
    // 切换菜单折叠
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }

}
</script>

<style scoped lang="less">
.home-container {
    height: 100%
}
.el-header {
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    background-color: #373D41;
    align-items: center;
    color: #fff;
    font-size: 20px;
    div {
        display: flex;
        align-items: center;
        span {
            margin-left: 10px
        }
    }
}
.el-aside {
    background-color: #333744;
}
.el-main {
    background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px
}
.el-menu {
  border-right: none;
}
.toggleNav {
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #ffffff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
